Connecting ELM327 to a 2000/2001 3200GT

[stradaman]

Any manifold difference, and ECU, retards ignition, as a precaution.
Comes and goes, does indeed, sound electrical, one of the major plugs?
I would also, look at the ECU. The major plug, into the ECU, might be loose.
Contiunity test?

Andy.

 

[stradaman]

Oh forgot, if you have on/off problems, have a look also at the oxygen sensor wiring. Poor connection here, can run wrong data to ECU, reason for the retard, of ignition.

Andy.

 

[Fat Arnie]

Stradaman, I don't think its an oxygen sensor -P0331 is a defo knock sensor issue. 0331 is knock sensor 2. Does anyone know if this is the front or rear one?


Also, Ive read up in the manual that the ECU defines an accceptable range for KS output voltage (this is measured as resistance at idle) does anyone know what the values are? If I can measure this (I'll also check its getting a good 5v DC supply from the ECU) I may get some way to figuring out. The Unidiag software also has a way to read the KS output as a trace. I might look at that too if I can get it to work.

Finally, and probably first, I'm going to buy some fuel at a different garage to normal..... just in case.

 

[Fat Arnie]

Well the moral of this story is that you don't need much coolant near a knock sensor to knacker it.

I removed the inlet manifold and there was a puddle of coolant - probably only 50mls in the area under the starter, which presumably lapped up onto the sensor when the car was being driven.

The convenience of the having Unidiag working meant that of the 4 supposedly duff KS I have I was able to find the two good ones and refit one of those.

All was going steamingly well until the test drive. I now have a big scuff on the rear bumper due to an 80 year old in a Volvo on a petrol station forecourt, who clearly imagined his turning circle was 3" smaller than it was.

 

[saintetienne]

Sorry about the volvo driver ! but good news re sensor

 

[ledlights]

Glad to hear you ticked this one off your list Arnie but not so about the Volvo....

Regards,

Steve

 

[Biturbista]

@Fat Arnie:

P0331 is caused by a knock sensor problem.
It is the knock sensor for cylinders 3-4-5-6 and the fault points to a wrong reading WITH THE IGNITION KEY TURNED ON (and NOT while running, since this would cause error P0330).

For cylinders 1-2-7-8 the error codes are P0326 (ignition key on) and P0325 (while running).

Hope this helps...

 

[Fat Arnie]

Thanks Biturbista. After a bit of research I figured out which one it was. As I had two good spares, I used them both anyway.

 

[frosch]

Arnie,

I think it would be worth trying the Unidiag with the USB VW/Audi interface...... I think I've read somewhere that there were a number of cars produced with the new style socket but original comms protocol, and if so, you could try Unidiag running the KWP2000 protocol and slow 5 baud initialisation on the cable straight into your OBD socket. All in for less than a tenner, so not much of a loss if it doesn't work.

Regards,

Steve

hello steve i have used the unidiag with the vw interface and it dont goes what you mean?

 

[ledlights]

Hi Christian,

Did you follow the "how to" guide on Unidiag in the Running Reports and Technical Fixes section of the forum? Have a look at that first but if you still can't get it working, a number of things could be causing the problem:

Have a look at the com port that the driver has chosen for the interface. From memory, this needs to be less than com8, you can change it through control panel using the instructions linked in the guide.

If that's okay, check that you have a good connection between the ISO adaptor and the positive terminal on the battery. If you have a series 1.5 car with a non-standard Protocol but a 16 pin OBD connector under the dash, you don't need a separate positive connection.

Next, if a series 1 car check you are connecting to the correct ISO connector! On a RHD car it's behind the carpet on the driver's side of the car and it's grey in colour with a cap covering the end. I don't know about a LHD car but it'll be shown on the Eurospares website if you look up the ECU or in the service manual.

Finally, an obvious one but make sure you turn on the ignition before you try to connect.

Hope this helps, any more problems PM me and I'll try to help further.

Regards,

Steve

 

[frosch]

thank you steve for this super help

 

[RossWA]

Arnie ,

I thought you said your car had recirc valves - that would make it a 2001 model and should be compliant ( are you thinking it is not compliant becasue it has not connected ? ) , mine does not have them ie 2000 model - puzzled !

The way to tell for sure is to get a picture of the ecu in the drivers footwell - the 2001 has slightly different codings

The attached file is a pic of a non eobd compliant ecu (like mine) if it a 2001 eobd compliant you will see the code "eobd" listed in the numbers - hope this helps ,

cheers

Hi Saintetienne,

You have just helped answer an important quaetion for me, my 3200 is a 2001 model and I have been trying to work out if it is OBD2 compliant. You post and picture gave me the clue that I was after, my ECU is labelled EOBD

Thanks
Ross

 

[saintetienne]

Great stuff , glad to be of assistance - that's good news as your car should be able to communicate with a wide range of diagnostic tools and software ,

cheers

Steve

 

[hodroyd]

Great forum and members, loads of help and info on here..!!